<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app"></div>
</body>
<script src="https://unpkg.com/vue@next"></script>
<script>
    const myMixin={
        data() {
            return {
                message:'hello mixin',
                mixinerror:'mixin error message'
            }
        },
        created() {
            console.log('mymixin --> created',this.mixinerror)
        },
    }
    const app=Vue.createApp({
        mixins:[myMixin],
        data() {
            return {
                messsage:'hello vue.js',
                systeMsg:'system message'
            }
        },
        template:`
        <div>
        {{message}}--
        {{mixinerror}}--
        {{systeMsg}}
        </div>
        </component-demo>`,
        created(){
            console.log('app-->created',this.systeMsg)
        }
    })
    app.component('component-demo',{
        template:`
        <div>{{mixinerror}}</div>`
    })
    const vm=app.mount("#app")
</script>
</html>